Tbh I just look at the line ups and go on flashscores. Start at midfield area then move to defence and look at each player and how many yellow cards appear next to their name and to be honest particularly last season and premier league games didn’t have to look half way in to the season as I had 2 players for each team in my head.
I think I was one of first to do the card doubles on here and the prices were amazing. i did really well last season. This season the prices are at an all time low so found myself not going for the ‘in form’ players but going for better prices. It’s not a market I can see myself doing much next season if the prices begin to tank
to answer your questions
1. I find centre midfielders then full backs are the best bet
2. I like to pick two players in same game one for either side